Electric forge



(No Model.)

G. D. BURTON & E. E. ANGELL. ELECTRIC FORGE.

No. 488,466. Patented Dec. 20-, 1892.

IINII l K I HI,

UNITED STATES PATENT OFFICE.

GEORGE D. BURTON, OF BOSTON, AND EDWIN E. ANGELL, OF SOMERVILLE,MASSACHUSETTS, ASSIGNORS TO THE ELECTRICAL FORGING COMPANY,

OF MAINE.

ELECTRIC FORGE.

SPECIFICATION forming part of Letters Patent No. 488,466, dated December20, 1892.

Application filed October 6, 1891.

To aZZwhom it may concern.-

Be it known that we, GEORGE D. BURTON, residing atBoston,in the countyof Suffolk, and EDWIN E. ANGELL, residing at Somerville, in the countyof Middlesex, State of Massachusetts, citizens of the United States ofAmerica, have invented certain new and useful Improvements in ElectricForges, of which the following is a specification.

This invention relates to an electric forge for heating to a forgingtemperature bars or blanks of metal from which articles are to beformed.

The object of the invention is to provide an electric forge for theconvenient and economical heating of bars or blanks from end to endthereof, and for heating bars having beveled or tapered ends.

Figure 1 of the accompanying drawings representsa front elevation ofthis improved electric forge in connection with an electric currentconverter. Fig. 2 represents aplan thereof. Fig. 3 represents an endview of one of the adjustable electrodes with its adjusting mechanism.

Similar numerals of reference indicate corresponding parts in thedifferent figures.

The rings and 11, whereof segments only are represented in the drawings,constitute the positive and-negative elements of an electric currentconverter for transforming a current of small volume and high voltageinto a current of low voltage and large volume. The construction of thisconverter does not constitute a part of this invention, and thereforeneed not be herein shown or described.

Any suitable current converter or source of electric heating currentsmay be used in connection with this improved forge. A short bracket 12,provided with a clamp 14 projects downward and outward from the ring 10,and a short bracket 13, provided with a clamp 15 is attached to the ring11 and projects upward and outward therefrom, terminating in the samehorizontal plane as the bracket 12. These brackets are composed ofcopper or other suitable conductive material or composition. A verticalrod is supported at its upper end in the clamp 14 of the bracket 12,being vertically adjustable therein, and a vertical rod 21 is supportedin the clamp 15 of Serial No. 407,900. (No model.)

the bracket 13, being vertically adjustable therein. A short horizontal,angular arm provided at its inner end with a clamp 31, is adj ustabieupon the vertical rod 21, and a horizontal, angular arm 4(),pr0vided atits inner end with a clamp 41, is adjustable on the vertical rod 20.These arms extend laterally from said bars for a short distance and thenextend forward, terminating opposite each other. They are providedrespectively with clamps 32 and 42 at their outer ends, said clampsbeing in alignment. An electrode is adjustable in the clamp 32, and anelectrode is adjustable in the clamp 42. The electrode 50 is providedwith a socket 51 at its inner end for receiving one end of the blank 100to be heated, and the electrode 60 is pro vided at its inner end with asimilar socket for receiving the opposite end of said blank.

One of the electrodes is provided with mechanism for thrusting andretracting it for the purpose of inserting and releasing the blanks. Themechanism herein shown for this purpose will now be described. The clamp32 is provided with dependent cars 33, in whicha short shaft 34 isjournaled. This shaft is provided with a pinion 35, and the electrode 50is pro vided on its under side with a rack 53, which is engaged by saidpinion. The shaft 34 is also provided at its outer end with a handwheel36, by which it is actuated. The arm 30 is provided with cars 37, inwhich a pulley 38 is journaled. The outer end of the electrode 50 isprovided with a lug 54, and a cord 55 attached to said lug passes overthe pulley 38 and supports a weight 56 at its lower end. The draft ofthe weighted cord tends to draw the electrode 50 toward the electrode60, and effect the clamping of the bar. The electrode is retracted torelease the bar by means of a rack and pinion, which may also serve forthrusting it.

In the use of this apparatus, the electrode,

to close the circuit between the electrodes and is heated by theelectric current which passes through it. -When heated to a forgingtemperature it is released by a turning of the hand-wheel, 36, wherebythe electrode, 50, is retracted.

We claim as our invention:

1. In an electric forge, the combination of an electrode provided withan end socket and with a rack, a conductor provided with a clamp, inwhich said electrode is movable, a crankshaft supported in said clampand provided with a pinion meshing with said rack, another electrode,andconductors connecting said electrodes with the source of a heatingcurrent.

2. The combination of two rings constituting opposite poles of anelectricconverter, rigid conductors connected with said rings, clamps atthe outer ends of said conductors, an electrode supported in one of saidclamps, and consisting of a solid bar provided with a cup-shaped socketat its inner end and another electrode supported in the other clamp andconsisting of a solid bar provided with a cupsha-ped socket at its innerend, said electrodes being adapted to receive the opposite ends of thebar to be heated, substantially as set forth.

3. The combination of two rings constituting opposite poles of anelectric converter, conductive brackets attached to said ringsrespectively, and provided with clamps at their outer ends, verticalrods adjustable in said clamps, com posed of conductive material,horizontal angular rods, connected with said vertical rods, clamps atthe outer ends of said angular rods, and electrodes adjustable in saidclamps and provided with cup-shaped sockets at their inner ends.

GEO. D. BURTON. EDWIN E. ANGELL. Witnesses:

CHESTER hIARR, R. W. GALLAPE.

